Bump core from 3311b24 to 5d83d06 (#4467)

Bumps [core](https://github.com/microsoft/typespec) from `3311b24` to
`5d83d06`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/microsoft/typespec/commit/5d83d0678443db45d71055424a0e725e9367070f"><code>5d83d06</code></a>
Http-server-csharp alloy rewrite (<a
href="https://redirect.github.com/microsoft/typespec/issues/10372">#10372</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/3447bf9a1c422ead84beb903b5064a3ef0599f74"><code>3447bf9</code></a>
Add Node 26 to CI test matrix (<a
href="https://redirect.github.com/microsoft/typespec/issues/10622">#10622</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/a1945ce660dd221e53f958d04a785a1fc905ce3a"><code>a1945ce</code></a>
[http-client-csharp] Adopt Spector payload/head
contentTypeHeaderInResponse s...</li>
<li><a
href="https://github.com/microsoft/typespec/commit/7c8833a0ec1294f9a7032933cf7652b947cd3697"><code>7c8833a</code></a>
playground: add http-server-js to the playground (<a
href="https://redirect.github.com/microsoft/typespec/issues/10700">#10700</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/704bfab482b2bc33d83d1a393af6e7ca4d17f0b0"><code>704bfab</code></a>
[http-client-csharp] Adopt Spector multiple-services scenario tests (<a
href="https://redirect.github.com/microsoft/typespec/issues/10663">#10663</a>)</li>
<li>See full diff in <a
href="https://github.com/microsoft/typespec/compare/3311b2400d5e90dbf58dd885520bb96353ee1ade...5d83d0678443db45d71055424a0e725e9367070f">compare
view</a></li>
</ul>
</details>
<br />


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core

@@ -23,6 +23,7 @@ catalog:
   "@alloy-js/core": ^0.23.0
   "@alloy-js/csharp": ^0.23.0
   "@alloy-js/markdown": ^0.23.0
+  "@alloy-js/msbuild": ^0.23.0
   "@alloy-js/python": ^0.4.0
   "@alloy-js/rollup-plugin": ^0.1.1
   "@alloy-js/typescript": ^0.23.0